Official JLPT workbooks and the sample questions on the official site are the only definitively representative material in existence - they are written by the people who write the exam.
They are also finite. Once you have seen a paper, it can never measure you cleanly again, because you will partly remember it.
Treat them as a scarce resource.
Divide them before you start
Sort what you have into three piles:
Pile 1 - study material. Untimed. Work through slowly, look things up, understand every question. Use the oldest or the least representative material here.
Pile 2 - practice under time. Full sections, timed, no dictionary. Reviewed properly afterwards.
Pile 3 - untouched. Two complete papers kept sealed for the final month. These are your real measurements.
The commonest mistake is using everything as pile 1 in month one, then having nothing to measure with in month five.
What to do with a paper you have sat
The sitting is 20% of the value. The review is the rest.
- Mark it, then sort every question: knew it / guessed right / wrong but now clear / wrong and still unclear.
- Guesses count as errors. A lucky guess is an unfound gap.
- For each error, name the cause - unknown word, misread grammar, ran out of time, misheard a number. The cause determines the fix, and “I was careless” is not a cause.
- Add to one error list and review it weekly.
The full method, which transfers directly: how to review a mock test.
Mine the vocabulary and grammar
Past papers are also a vocabulary source, and a well-targeted one: the words in them are, by definition, words the exam thinks belong at that level.
After reviewing a paper, take every unknown word into your review system. Twenty words from a real paper are worth more than a hundred from a random list.
Do not re-sit a paper for a score
You will score higher and learn nothing. If you must revisit one, wait at least a month and use it as a reading-speed exercise rather than a measurement.
What to do when you run out
Official material is limited, and third-party mock papers vary in quality. Two safeguards:
- Prefer publishers who state which level and which section each question targets.
- Be suspicious of anything presented as a reproduced past paper. Reproductions circulating online are often rewritten from memory, with errors baked in, and practising against a faulty answer key is worse than not practising at all.
Schedule the sittings
Do not sit papers whenever you feel like it. Put them in the calendar: how often to sit mock tests, and check each result against the sectional minimums rather than the total.
For JFT-Basic the equivalent problem is solved differently: our free exam demo is a complete original mock, written in-house at A2 level, sat under the real exam’s rules.